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3 Sheets-Sheet 1.

E. C. FLAGG, Administrator. BORING MACHINE.

Patented May 5, 1891.

(No Model.)

BORING MACHINE.

No. 451,595. Patented May 5,1891.

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(No Model.) A. JEWELL Decd. 3 SheetsSheet 3.

' E. 0. FLAGG, Administlator.

BORING MAUHINE.

No. 451,595. D Patented May 5,1891.

UNITED STATES PATENT OFFICE.

AMMI M. JEIVELL, OF SAN FRANCISCO, CALIFORNIA; EDWVIN C. FLAGG ADMINISTRATOR OF SAID AMMI M. JEIVELL, DECEASED.

BORING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 451,595, dated May 5, 1891.

Application filed June 24, 1890. fierial No. 356,553. (No model.)

To all whom it may concern.-

Be it known that I, AMMI M. JEWELL, a citizenof the United States, residing in the city and county of San Francisco, State of California, have invented an Improvement in Boring-Machines; and I hereby declare the following to be afull, clear, and exact description of the same.

My invention relates to the general class of boring-machines, and particularly to a machine for boring holes in the rails of doors, blinds, and sashes to receive dowel pins, whereby said rails are connected with the stiles, instead of by the usual mortises and tenons.

The object of my invention is to provide a machine for readily boring the holes in both ends of the rails.

It consists in the novel constructions and combinations hereinafter fully described, and specifically pointed out in the claim.

Referring to the accompanying drawings for a more complete explanation of my invention, Figure 1 is a side View of my machine. Fig. 2 is a plan of same. Fig. 3 is an end view and section.

A is the frame of the machine. Upon its top are mounted the sliding carriages B, one at each end thereof. In these carriages are mounted the shafts C, which carry upon their inner ends the angers D. Upon the frametop, between the two sets of angers, are mounted the opposing stop or guide bars E, between which the rails are held. These bars are adapted to slide to and from each other upon the frame-top, so as to adapt the space between them for difierent lengths of rails, and they are set in proper position by means of screws e.

The operation of these parts is as follows: The rail is placed between the two guidebars with its ends opposing the sets of angers. The sliding carriages B are now moved inwardly and the angers are rotated. They are thus fed up to the ends of the rail and simultaneously bore holesin each end. hen this is complete, the sliding carriages are drawn back by means of weights IV, connected with their outer ends. A sliding movement is imparted to these carriages by the following mechanism: F is a treadle in the lower portion of the frame. From this treadle extends upwardly a rod G, which receives at its upper end apin g, upon which is also slotted the meeting inner ends of the longer arms of bell-crank levers II, the shorter arms of which are connected by links I with the outer ends of the carriages. Now by pressing down upon the treadle the bell-crank levers are vibrated, whereby through the links they draw the carriages together and feed the angers up to their work. In the links are made a series of holes '5, adapting them to be connected at different points with the bell-crank levers, whereby the movement of the carriages is regulated to suit the position of the stop or guide bars and the length of the rail being operated upon. The auger-shafts are rotated by means of a single power-shaft J, extending the length of the frame and having the usual fast and loose pulleys j at one end. Upon this shaft are mounted pulleys K, from which belts L extend to pulleys M, feathered upon the auger-shafts. Suitable clamps will be provided to hold the rails down in place.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

An improved boring-machine consisting of the main frame, the sliding carriages at the opposite ends of the frame and movable toward and from each other, the shafts mounted in the carriages in the direction of the length of the machine and having angers on their inner ends, the stops or guide-bars at the central portion of the machine, having screws by which they are adj ustably held, a single power-shaft with pulleys thereon connected by belts with pulleys on the auger-shafts, whereby the latter are rotated, a treadle F, a rod extending upwardly therefrom, the levers H, slotted at their inner ends upon a pin on said rod, the links I, connected with the short arms of the levers and having holes formed therein, adapting said links I to be connected at different points with the short arms of the levers, and the weights IV, connected with the carriages for returning them, substantially as herein described.

In witness whereof I have hereunto set my hand.

AMHI M. JEWELL.

Witnesses: S. H. NOURSE,

H. C. LEE. 

